▎ 摘　　要

NOVELTY - Preparation of graphene aerogel involves placing solid oxide graphene in double distilled water, preparing aqueous solution of graphene oxide, adding to a cylindrical vessel, transferring to water in autoclave (B), adding polytetrafluoroethylene, thermally reacting at constant temperature, reacting, cooling to room temperature, pretreating obtained product and drying in drying apparatus. USE - Preparation of graphene aerogel used for preparing screen-printed electrode/graphene aerogel/nitrate ion-selective electrode for detecting nitrate ion (claimed). ADVANTAGE - The screen-printed electrode/graphene aerogel/nitrate ion-selective electrode prepared using graphene aerogel has excellent selectivity with respect to nitrate ion. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for application for preparing screen printed electrode/graphene aerogel/nitrate ion-selective electrode for detecting nitrate ion.